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///////////////////////////////////////////////////////////////////////////////////////////////////
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// Copyright 2017 Leszek Koltunski //
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// //
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// This file is part of Distorted. //
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// //
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// Distorted is free software: you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation, either version 2 of the License, or //
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// (at your option) any later version. //
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// //
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// Distorted is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with Distorted. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////////////////////
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package org.distorted.library.effect;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Abstract class that represents an Effect that works by injecting certain code into the main Vertex shader.
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*/
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public abstract class VertexEffect extends Effect
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{
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/**
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* 12: 5 per-effect interpolated values, 3-dimensional center, 4-dimensional Region
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*/
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public static final int NUM_UNIFORMS = 12;
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static final int VALUES_OFFSET = 0;
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static final int CENTER_OFFSET = 5;
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static final int REGION_OFFSET = 8;
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private static String mGLSL = "";
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private static int mNumEnabled = 0;
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///////////////////////////////////////////////////////////////////////////////////////////////////
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VertexEffect(EffectName name)
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{
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super(name);
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// prepare code to be injected into the 'main_vertex_shader' main() function.
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static void addEffect(EffectName name, String code)
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{
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int effect = name.ordinal();
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if( mEnabled[effect] ) return;
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mEnabled[effect] = true;
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mNumEnabled ++;
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mGLSL +=
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"if( vName[i]=="+effect+")\n" +
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"{\n" +
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code +"\n" +
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"}\n" +
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"else\n";
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Only for use by the library itself.
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*
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* @y.exclude
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*/
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public static String getGLSL()
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{
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return mGLSL + "{}";
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static void destroyStatics()
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{
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mNumEnabled = 0;
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mGLSL = "";
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////
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// PUBLIC API
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///////////////////////////////////////////////////////////////////////////////////////////////////
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/**
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* Return the number of Vertex effects enabled.
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*/
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public static int getNumEnabled()
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{
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return mNumEnabled;
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}
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}
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